Warranty - U.S. & Canada

Cummins Westport offers base engine warranty and a variety of extended coverage plans to meet customers' needs.  Below is a summary of warranty plans available.  As plans are subject to change, please contact your Cummins or Cummins Westport representative for details on the best available option for your fleet.

ISL G Transit/Shuttle Bus Base Engine Warranty

The ISL G Base Transit Engine Warranty of 2 years with unlimited miles/kilometers is the same warranty as for a Cummins diesel engine. Additional Extended Coverage is included with Base Warranty.

  • Warrantable Failures of the Engine cylinder block, camshaft and crankshaft, connecting rods and Cummins fan clutch (Covered Parts).
  • This Coverage begins with the expiration of the Base Engine Warranty and ends at three years or 300,000 miles (482,804 kilometers) or 10,800 hours of operation, whichever occurs first.
  • Optional 5 Year Extended Coverage is available for ISL G and ISL G NZ engines in transit and shuttle applications.
  • Plans begin on the expiration of the Cummins Base Engine Warranty applicable to the Engine and offer 3 more years of coverage.
  • Coverage ends at the time, miles (kilometers) or hours specified whichever occurs first, AS MEASURED FROM THE CUMMINS BASE ENGINE WARRANTY START DATE.
  • Options:
    • 5 years / 200,000 miles (321,869 km)
    • 5 Years / 300,000 miles (482,804 km)
  • 100% parts and labor
  • Maintenance components are excluded from coverage.

ISL G / ISB6.7 G School Bus Base Engine Warranty

  • 100% parts and labor
  • 5 years / 100,000 miles (160,935 kilometers)
  • No Charge – Extended Major Components Coverage
    • Cylinder block, crankshaft, camshaft, connecting rods (Covered Parts)
    • Coverage begins on expiry of base warranty and extends for 3 yr / 300,000 miles (482,805 km)

Optional 5 Year School Bus Extended Coverage

  • 100% parts and labor
  • Three plans with up to 7 years and Unlimited Mile options to meet customer requirements